US3825408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot air heater for carton sealing machine
Assignee: Phillips Petroleum Co
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Filing: 1973-09-07
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Granted: 1974-07-23
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Expires: 1993-09-07
Abstract
Abstract In a machine for filling and sealing cartons such as the thermoplastic coated paperboard milk cartons, the heater head for heating the upper portion of the carton prior to sealing comprises a first hot air plenum chamber which enters the open end of the carton and has a continuous outer perforated wall facing the inner surface of the carton and a second hot air plenum chamber which surrounds the outside of the upper end of the carton and has a continuous inner perforated wall facing the outside surface of the carton. The outer wall of the first plenum chamber and the inner wall of the second plenum chamber form a continuous annular space for receiving the top marginal portion of a carton, with the perforations in both walls being spaced to provide heating of both the inner surface and the outer surface of the full extent of the top marginal portion of the carton. The outer wall of the first plenum chamber and the inner wall of the outer plenum chamber extend downwardly and outwardly away from the central vertical axis of the carton while the inner wall of the second plenum chamber extends downwardly and outwardly with respect to the central vertical axis of the carton.
Inventors
- 👤 S Farfaglia
- 👤 R Halpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:16
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/10; B29C65/103; B29B; B29B13/00; B29B13/02; B29B13/023; B29B13/024; B29B13/025; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/43122; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/84; B29C66/849; B65; B65B; B65B51/00; B65B51/10; B65B51/20; B29C66/71; B29C66/81; B29C66/816; B29C66/8167; B29L; B29L2031/00; B29L2031/712; B29L2031/7162; B29L2031/7166
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
307 words
In a machine for filling and sealing gable top cartons formed from thermoplastic coated paperboard, a heating head for heating the ridge panels of a filled carton prior to sealing said filled carton, the score lines in the gable top carton forming structure of said carton having been broken to form the six ridge panels thereof into a six sided opening, which comprises a support base, means attached to a central portion of the lower surface of said support base to define a central plenum chamber having a continuous outer perforated wall which has six sections corresponding to the six sides of said opening in said carton, means attached to the peripheral portion of the lower surface of said support base to define an outer annular plenum chamber having a continuous inner perforated wall with six sections corresponding to the six sides of said opening, said outer wall of said central plenum chamber and said inner wall of said outer plenum chamber forming an annular space adapted to receive therein the ridge panels of a prebroken gable top structure of a filled carton without contact between the carton and the heating head, means for introducing heated gas into said central plenum chamber and into said outer plenum chamber, said outer wall of said central plenum chamber having perforations therethrough spaced at intervals along the length of each of the six sections thereof for directing jets of heated gas at the inner surface of each of the six ridge panels of the carton being heated, said outer wall of said central plenum chamber being inclined downwardly from said support base and outwardly away from the vertical axis of the carton being heated so that said jets of heated gas strike the inner surfaces of said ridge panels at acute angles and are deflected upwardly out of the carton.
Claim 2
Dependent Claim
307 words
In a machine for filling and sealing gable top cartons formed from thermoplastic coated paperboard, a heating head for heating the ridge panels of a filled carton prior to sealing said filled carton, the score lines in the gable top carton forming structure of said carton having been broken to form the six ridge panels thereof into a six sided opening, which comprises a support base, means attached to a central portion of the lower surface of said support base to define a central plenum chamber having a continuous outer perforated wall which has six sections corresponding to the six sides of said opening in said carton, means attached to the peripheral portion of the lower surface of said support base to define an outer annular plenum chamber having a continuous inner perforated wall with six sections corresponding to the six sides of said opening, said outer wall of said central plenum chamber and said inner wall of said outer plenum chamber forming an annular space adapted to receive therein the ridge panels of a prebroken gable top structure of a filled carton without contact between the carton and the heating head, means for introducing heated gas into said central plenum chamber and into said outer plenum chamber, said outer wall of said central plenum chamber having perforations therethrough spaced at intervals along the length of each of the six sections thereof for directing jets of heated gas at the inner surface of each of the six ridge panels of the carton being heated, said outer wall of said central plenum chamber being inclined downwardly from said support base and outwardly away from the vertical axis of the carton being heated so that said jets of heated gas strike the inner surfaces of said ridge panels at acute angles and are deflected upwardly out of the carton.
Claim 3
Dependent Claim
60 words
Apparatus in accordance with claim 1 wherein said inner wall of said outer plenum chamber is inclined downwardly from said support base and outwardly from the vertical axis of the carton being heated so that said inner wall of said outer plenum chamber and said outer wall of said inner plenum chamber are at least generally parallel to each other.
Claim 4
Dependent Claim
81 words
Apparatus in accordance with claim 2 wherein said inner wall of said outer plenum chamber has perforations therethrough spaced at intervals along the length of each of the six sections thereof for directing jets of heated gas at the outer surface of each of the six ridge panels of the carton being heated so that the jets of heated gas from said outer plenum chamber strike the outer surface of said six ridge panels at acute angles and are deflected downwardly.
Claim 5
Dependent Claim
298 words
Apparatus in accordance with claim 3 wherein a first one and a second one of the six sections of said inner wall of said outer plenum chamber are parallel to each other, a third one and a fourth one of the six sections of said inner wall of said outer plenum chamber are joined together between a first pair of adjacent ends of said first one and said second one to form a V having the apex thereof directed toward the central vertical axis of the carton being heated, a fifth one and a sixth one of the six sections of said inner wall of said outer plenum chamber are joined together between a second pair of adjacent ends of said first one and said second one to form a V having the apex thereof directed toward the central vertical axis of the carton being heated, said outer plenum chamber having a continuous outer wall with four connected sections, a first one and a second one of said four sections being parallel to said first one and second one seCtions of said six sections of said inner wall of said outer plenum chamber, a third one of said four sections together with said third one and fourth one of said six sections of said inner wall of said outer plenum chamber forming a first generally triangular chamber, a fourth one of said four sections together with said fifth one and sixth one of said six sections of said inner wall of said outer plenum chamber forming a second generally triangular chamber, and wherein said means for introducing heated gas into said outer plenum chamber comprises first means for introducing heated gas into said first triangular chamber and second means for introducing heated gas into said second triangular chamber.
Claim 6
Dependent Claim
94 words
Apparatus in accordance with claim 4 further comprising a first partition wall extending from said first section of said inner wall of said outer plenum chamber to the adjacent one of said first and second sections of the outer wall of said outer plenum chamber, and a second partition wall extending from said second section of said inner wall of said outer plenum chamber to the adjacent one of said first and second sections of the outer wall of said outer plenum chamber to thereby divide the outer plenum chamber into two separate chambers.
Claim 7
Dependent Claim
32 words
Apparatus in accordance with claim 5 wherein the outer wall of said central plenum chamber is inclined at an angle to the vertical in the range of about 10* to about 30*.
Claim 8
Dependent Claim
81 words
Apparatus in accordance with claim 1 wherein said inner wall of said outer plenum chamber has perforations therethrough spaced at intervals along the length of each of the six sections thereof for directing jets of heated gas at the outer surface of each of the six ridge panels of the carbon being heated so that the jets of heated gas from said outer plenum chamber strike the outer surface of said six ridge panels at acute angles and are deflected downwardly.
Claim 9
Dependent Claim
298 words
Apparatus in accordance with claim 1 wherein a first one and a second one of the six sections of said inner wall of said outer plenum chamber are parallel to each other, a third one and a fourth one of the six sections of said inner wall of said outer plenum chamber are joined together between a first pair of adjacent ends of said first one and said second one to form a V having the apex thereof directed toward the central vertical axis of the carton being heated, a fifth one and a sixth one of the six sections of said inner wall of said outer plenum chamber are joined together between a second pair of adjacent ends of said first one and said second one to form a V having the apex thereof directed toward the central vertical axis of the carton being heated, said outer plenum chamber having a continuous outer wall with four connected sections, a first one and a second one of said four sections being parallel to said first one and second one sections of said six sections of said inner wall of said outer plenum chamber, a third one of said four sections together with said third one and fourth one of said six sections of said inner wall of said outer plenum chamber forming a first generally triangular chamber, a fourth one of said four sections together with said fifth one and sixth one of said six sections of said inner wall of said outer plenum chamber forming a second generally triangular chamber, and wherein said means for introducing heated gas into said outer plenum chamber comprises first means for introducing heated gas into said first triangular chamber and second means for introducing heated gas into said second triangular chamber.
Claim 10
Dependent Claim
94 words
Apparatus in accordance with claim 8 further comprising a first partition wall extending from said first section of said inner wall of said outer plenum chamber to the adjacent one of said first and second sections of the outer wall of said outer plenum chamber, and a second partition wall extending from said second section of said inner wall of said outer plenum chamber to the adjacent one of said first and second sections of the outer Wall of said outer plenum chamber to thereby divide said outer plenum chamber into two separate chambers.
Claim 11
Dependent Claim
32 words
Apparatus in accordance with claim 1 wherein the outer wall of said central plenum chamber is inclined at an angle to the vertical in the range of about 10* to about 30*.
References Cited (Backward Citations)
US3566762A
Cited
US3724093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |